(X^2+34x-71)/(X^2+2x-7)求这个的极值（貌似有好多答案）请详细讲讲~

分类: 作业答案 • 2022-03-15 19:19:05

问题描述：

(X^2+34x-71)/(X^2+2x-7)求这个的极值（貌似有好多答案）请详细讲讲~
X^2这个是X平方

答

f(x)=(x²+34x-71)/(x²+2x-7)f′(x)=[(2x+34)(x²+2x-7) - (2x+2)(x²+34x-71)]/(x²+2x-7)²=[(2x³+38x²+54x-238) - (2x³+70x²-74x-142)]/(x²+2x-7)²=[ -3...